People think atheist are arrogant when they laugh and point at theists. But it's no different than laughing and pointing at a grown adult who truly believes in Santa Claus.
I'm an atheist and I surely don't point and laugh and theists. At one point I was even one of them, then I started to investigate and question and seek out answers and came to the point I am at today. Just because someone else believes in God(s) doesn't mean they are worthy of ridicule -- most people are brought up to believe in God(s) and have to willingly and deliberately question all of it to change their views (or further confirm them). IMO most of them never attempt to take that first step, thus they would be like the children who believe in Santa Claus because they have never had a need or desire to question it.
Plus we know Santa Claus to be fiction. And as much as I think God is as well, we don't know that God is fiction.